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30#ifndef FS_NFS_PNFS_H
31#define FS_NFS_PNFS_H
32
33#include <linux/refcount.h>
34#include <linux/nfs_fs.h>
35#include <linux/nfs_page.h>
36#include <linux/workqueue.h>
37
38struct nfs4_opendata;
39
40enum {
41 NFS_LSEG_VALID = 0,
42 NFS_LSEG_ROC,
43 NFS_LSEG_LAYOUTCOMMIT,
44 NFS_LSEG_LAYOUTRETURN,
45 NFS_LSEG_UNAVAILABLE,
46};
47
48
49struct nfs4_pnfs_ds_addr {
50 struct sockaddr_storage da_addr;
51 size_t da_addrlen;
52 struct list_head da_node;
53 char *da_remotestr;
54 const char *da_netid;
55 int da_transport;
56};
57
58struct nfs4_pnfs_ds {
59 struct list_head ds_node;
60 char *ds_remotestr;
61 struct list_head ds_addrs;
62 struct nfs_client *ds_clp;
63 refcount_t ds_count;
64 unsigned long ds_state;
65#define NFS4DS_CONNECTING 0
66};
67
68struct pnfs_layout_segment {
69 struct list_head pls_list;
70 struct list_head pls_lc_list;
71 struct list_head pls_commits;
72 struct pnfs_layout_range pls_range;
73 refcount_t pls_refcount;
74 u32 pls_seq;
75 unsigned long pls_flags;
76 struct pnfs_layout_hdr *pls_layout;
77};
78
79enum pnfs_try_status {
80 PNFS_ATTEMPTED = 0,
81 PNFS_NOT_ATTEMPTED = 1,
82 PNFS_TRY_AGAIN = 2,
83};
84
85#ifdef CONFIG_NFS_V4_1
86
87#define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4"
88
89
90
91
92
93#define NFS4_DEF_DS_TIMEO 600
94#define NFS4_DEF_DS_RETRANS 5
95#define PNFS_DEVICE_RETRY_TIMEOUT (120*HZ)
96
97enum {
98 NFS_LAYOUT_RO_FAILED = 0,
99 NFS_LAYOUT_RW_FAILED,
100 NFS_LAYOUT_BULK_RECALL,
101 NFS_LAYOUT_RETURN,
102 NFS_LAYOUT_RETURN_LOCK,
103 NFS_LAYOUT_RETURN_REQUESTED,
104 NFS_LAYOUT_INVALID_STID,
105 NFS_LAYOUT_FIRST_LAYOUTGET,
106 NFS_LAYOUT_INODE_FREEING,
107 NFS_LAYOUT_HASHED,
108};
109
110enum layoutdriver_policy_flags {
111
112
113 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0,
114 PNFS_LAYOUTRET_ON_ERROR = 1 << 1,
115 PNFS_READ_WHOLE_PAGE = 1 << 2,
116 PNFS_LAYOUTGET_ON_OPEN = 1 << 3,
117};
118
119struct nfs4_deviceid_node;
120
121
122struct pnfs_layoutdriver_type {
123 struct list_head pnfs_tblid;
124 const u32 id;
125 const char *name;
126 struct module *owner;
127 unsigned flags;
128 unsigned max_deviceinfo_size;
129 unsigned max_layoutget_response;
130
131 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *);
132 int (*clear_layoutdriver) (struct nfs_server *);
133
134 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags);
135 void (*free_layout_hdr) (struct pnfs_layout_hdr *);
136
137 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags);
138 void (*free_lseg) (struct pnfs_layout_segment *lseg);
139 void (*add_lseg) (struct pnfs_layout_hdr *layoutid,
140 struct pnfs_layout_segment *lseg,
141 struct list_head *free_me);
142
143 void (*return_range) (struct pnfs_layout_hdr *lo,
144 struct pnfs_layout_range *range);
145
146
147 const struct nfs_pageio_ops *pg_read_ops;
148 const struct nfs_pageio_ops *pg_write_ops;
149
150 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode);
151
152 int (*sync)(struct inode *inode, bool datasync);
153
154
155
156
157
158 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *);
159 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int);
160
161 void (*free_deviceid_node) (struct nfs4_deviceid_node *);
162 struct nfs4_deviceid_node * (*alloc_deviceid_node)
163 (struct nfs_server *server, struct pnfs_device *pdev,
164 gfp_t gfp_flags);
165
166 int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *);
167
168 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data);
169 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args);
170 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args);
171};
172
173struct pnfs_commit_ops {
174 void (*setup_ds_info)(struct pnfs_ds_commit_info *,
175 struct pnfs_layout_segment *);
176 void (*release_ds_info)(struct pnfs_ds_commit_info *,
177 struct inode *inode);
178 int (*commit_pagelist)(struct inode *inode,
179 struct list_head *mds_pages,
180 int how,
181 struct nfs_commit_info *cinfo);
182 void (*mark_request_commit) (struct nfs_page *req,
183 struct pnfs_layout_segment *lseg,
184 struct nfs_commit_info *cinfo,
185 u32 ds_commit_idx);
186 void (*clear_request_commit) (struct nfs_page *req,
187 struct nfs_commit_info *cinfo);
188 int (*scan_commit_lists) (struct nfs_commit_info *cinfo,
189 int max);
190 void (*recover_commit_reqs) (struct list_head *list,
191 struct nfs_commit_info *cinfo);
192 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo,
193 struct page *page);
194};
195
196struct pnfs_layout_hdr {
197 refcount_t plh_refcount;
198 atomic_t plh_outstanding;
199 struct list_head plh_layouts;
200 struct list_head plh_bulk_destroy;
201 struct list_head plh_segs;
202 struct list_head plh_return_segs;
203 unsigned long plh_block_lgets;
204 unsigned long plh_retry_timestamp;
205 unsigned long plh_flags;
206 nfs4_stateid plh_stateid;
207 u32 plh_barrier;
208 u32 plh_return_seq;
209 enum pnfs_iomode plh_return_iomode;
210 loff_t plh_lwb;
211 const struct cred *plh_lc_cred;
212 struct inode *plh_inode;
213 struct rcu_head plh_rcu;
214};
215
216struct pnfs_device {
217 struct nfs4_deviceid dev_id;
218 unsigned int layout_type;
219 unsigned int mincount;
220 unsigned int maxcount;
221 struct page **pages;
222 unsigned int pgbase;
223 unsigned int pglen;
224 unsigned char nocache : 1;
225};
226
227#define NFS4_PNFS_GETDEVLIST_MAXNUM 16
228
229struct pnfs_devicelist {
230 unsigned int eof;
231 unsigned int num_devs;
232 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM];
233};
234
235extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *);
236extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
237
238
239extern size_t max_response_pages(struct nfs_server *server);
240extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
241 struct pnfs_device *dev,
242 const struct cred *cred);
243extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout);
244extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync);
245
246
247void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo);
248void pnfs_put_lseg(struct pnfs_layout_segment *lseg);
249
250void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *);
251void unset_pnfs_layoutdriver(struct nfs_server *);
252void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio);
253void pnfs_generic_pg_check_range(struct nfs_pageio_descriptor *pgio, struct nfs_page *req);
254void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
255int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
256void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
257 struct nfs_page *req, u64 wb_size);
258void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *);
259int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc);
260size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio,
261 struct nfs_page *prev, struct nfs_page *req);
262void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg);
263struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp);
264void pnfs_layoutget_free(struct nfs4_layoutget *lgp);
265void pnfs_free_lseg_list(struct list_head *tmp_list);
266void pnfs_destroy_layout(struct nfs_inode *);
267void pnfs_destroy_layout_final(struct nfs_inode *);
268void pnfs_destroy_all_layouts(struct nfs_client *);
269int pnfs_destroy_layouts_byfsid(struct nfs_client *clp,
270 struct nfs_fsid *fsid,
271 bool is_recall);
272int pnfs_destroy_layouts_byclid(struct nfs_client *clp,
273 bool is_recall);
274bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst,
275 struct pnfs_layout_range *dst_range,
276 struct inode *inode);
277void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo);
278void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo,
279 const nfs4_stateid *new,
280 const struct cred *cred,
281 bool update_barrier);
282int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
283 struct list_head *tmp_list,
284 const struct pnfs_layout_range *recall_range,
285 u32 seq);
286int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo,
287 struct list_head *tmp_list,
288 const struct pnfs_layout_range *recall_range,
289 u32 seq);
290int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo,
291 struct list_head *lseg_list);
292bool pnfs_roc(struct inode *ino,
293 struct nfs4_layoutreturn_args *args,
294 struct nfs4_layoutreturn_res *res,
295 const struct cred *cred);
296int pnfs_roc_done(struct rpc_task *task, struct nfs4_layoutreturn_args **argpp,
297 struct nfs4_layoutreturn_res **respp, int *ret);
298void pnfs_roc_release(struct nfs4_layoutreturn_args *args,
299 struct nfs4_layoutreturn_res *res,
300 int ret);
301bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task);
302void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t);
303void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data);
304int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
305int pnfs_generic_sync(struct inode *inode, bool datasync);
306int pnfs_nfs_generic_sync(struct inode *inode, bool datasync);
307int _pnfs_return_layout(struct inode *);
308int pnfs_commit_and_return_layout(struct inode *);
309void pnfs_ld_write_done(struct nfs_pgio_header *);
310void pnfs_ld_read_done(struct nfs_pgio_header *);
311void pnfs_read_resend_pnfs(struct nfs_pgio_header *, unsigned int mirror_idx);
312struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
313 struct nfs_open_context *ctx,
314 loff_t pos,
315 u64 count,
316 enum pnfs_iomode iomode,
317 bool strict_iomode,
318 gfp_t gfp_flags);
319void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo,
320 const nfs4_stateid *arg_stateid,
321 const struct pnfs_layout_range *range,
322 const nfs4_stateid *stateid);
323
324void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo,
325 struct pnfs_layout_segment *lseg,
326 bool (*is_after)(const struct pnfs_layout_range *lseg_range,
327 const struct pnfs_layout_range *old),
328 bool (*do_merge)(struct pnfs_layout_segment *lseg,
329 struct pnfs_layout_segment *old),
330 struct list_head *free_me);
331
332void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp);
333int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *);
334int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *);
335struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
336void pnfs_error_mark_layout_for_return(struct inode *inode,
337 struct pnfs_layout_segment *lseg);
338void pnfs_layout_return_unused_byclid(struct nfs_client *clp,
339 enum pnfs_iomode iomode);
340
341
342enum {
343 NFS_DEVICEID_INVALID = 0,
344 NFS_DEVICEID_UNAVAILABLE,
345 NFS_DEVICEID_NOCACHE,
346};
347
348
349struct nfs4_deviceid_node {
350 struct hlist_node node;
351 struct hlist_node tmpnode;
352 const struct pnfs_layoutdriver_type *ld;
353 const struct nfs_client *nfs_client;
354 unsigned long flags;
355 unsigned long timestamp_unavailable;
356 struct nfs4_deviceid deviceid;
357 struct rcu_head rcu;
358 atomic_t ref;
359};
360
361struct nfs4_deviceid_node *
362nfs4_find_get_deviceid(struct nfs_server *server,
363 const struct nfs4_deviceid *id, const struct cred *cred,
364 gfp_t gfp_mask);
365void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
366void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *,
367 const struct nfs4_deviceid *);
368bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);
369void nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node);
370void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node);
371bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node);
372void nfs4_deviceid_purge_client(const struct nfs_client *);
373
374
375struct pnfs_commit_array *pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags);
376void pnfs_free_commit_array(struct pnfs_commit_array *p);
377struct pnfs_commit_array *pnfs_add_commit_array(struct pnfs_ds_commit_info *,
378 struct pnfs_commit_array *,
379 struct pnfs_layout_segment *);
380
381void pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo,
382 struct pnfs_layout_segment *lseg);
383void pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo);
384
385void pnfs_generic_clear_request_commit(struct nfs_page *req,
386 struct nfs_commit_info *cinfo);
387void pnfs_generic_commit_release(void *calldata);
388void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data);
389void pnfs_generic_rw_release(void *data);
390void pnfs_generic_recover_commit_reqs(struct list_head *dst,
391 struct nfs_commit_info *cinfo);
392struct nfs_page *pnfs_generic_search_commit_reqs(struct nfs_commit_info *cinfo,
393 struct page *page);
394int pnfs_generic_commit_pagelist(struct inode *inode,
395 struct list_head *mds_pages,
396 int how,
397 struct nfs_commit_info *cinfo,
398 int (*initiate_commit)(struct nfs_commit_data *data,
399 int how));
400int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max);
401void pnfs_generic_write_commit_done(struct rpc_task *task, void *data);
402void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds);
403struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs,
404 gfp_t gfp_flags);
405void nfs4_pnfs_v3_ds_connect_unload(void);
406int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
407 struct nfs4_deviceid_node *devid, unsigned int timeo,
408 unsigned int retrans, u32 version, u32 minor_version);
409struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net,
410 struct xdr_stream *xdr,
411 gfp_t gfp_flags);
412void pnfs_layout_mark_request_commit(struct nfs_page *req,
413 struct pnfs_layout_segment *lseg,
414 struct nfs_commit_info *cinfo,
415 u32 ds_commit_idx);
416void pnfs_lgopen_prepare(struct nfs4_opendata *data,
417 struct nfs_open_context *ctx);
418void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp,
419 struct nfs_open_context *ctx);
420void nfs4_lgopen_release(struct nfs4_layoutget *lgp);
421
422static inline bool nfs_have_layout(struct inode *inode)
423{
424 return NFS_I(inode)->layout != NULL;
425}
426
427static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo)
428{
429 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0;
430}
431
432static inline struct nfs4_deviceid_node *
433nfs4_get_deviceid(struct nfs4_deviceid_node *d)
434{
435 atomic_inc(&d->ref);
436 return d;
437}
438
439static inline struct pnfs_layout_segment *
440pnfs_get_lseg(struct pnfs_layout_segment *lseg)
441{
442 if (lseg) {
443 refcount_inc(&lseg->pls_refcount);
444 smp_mb__after_atomic();
445 }
446 return lseg;
447}
448
449static inline bool
450pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg)
451{
452 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0;
453}
454
455
456static inline int pnfs_enabled_sb(struct nfs_server *nfss)
457{
458 return nfss->pnfs_curr_ld != NULL;
459}
460
461static inline int
462pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
463 struct nfs_commit_info *cinfo)
464{
465 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
466
467 if (fl_cinfo == NULL || fl_cinfo->ncommitting == 0)
468 return PNFS_NOT_ATTEMPTED;
469 return fl_cinfo->ops->commit_pagelist(inode, mds_pages, how, cinfo);
470}
471
472static inline struct pnfs_ds_commit_info *
473pnfs_get_ds_info(struct inode *inode)
474{
475 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
476
477 if (ld == NULL || ld->get_ds_info == NULL)
478 return NULL;
479 return ld->get_ds_info(inode);
480}
481
482static inline void
483pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
484{
485 struct pnfs_ds_commit_info *inode_cinfo = pnfs_get_ds_info(inode);
486 if (inode_cinfo != NULL)
487 fl_cinfo->ops = inode_cinfo->ops;
488}
489
490static inline void
491pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo)
492{
493 INIT_LIST_HEAD(&fl_cinfo->commits);
494 fl_cinfo->ops = NULL;
495}
496
497static inline void
498pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
499{
500 if (fl_cinfo->ops != NULL && fl_cinfo->ops->release_ds_info != NULL)
501 fl_cinfo->ops->release_ds_info(fl_cinfo, inode);
502}
503
504static inline void
505pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node)
506{
507 set_bit(NFS_DEVICEID_INVALID, &node->flags);
508}
509
510static inline bool
511pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
512 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
513{
514 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
515
516 if (!lseg || !fl_cinfo->ops || !fl_cinfo->ops->mark_request_commit)
517 return false;
518 fl_cinfo->ops->mark_request_commit(req, lseg, cinfo, ds_commit_idx);
519 return true;
520}
521
522static inline bool
523pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
524{
525 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
526
527 if (!fl_cinfo || !fl_cinfo->ops || !fl_cinfo->ops->clear_request_commit)
528 return false;
529 fl_cinfo->ops->clear_request_commit(req, cinfo);
530 return true;
531}
532
533static inline int
534pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
535 int max)
536{
537 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
538
539 if (!fl_cinfo || fl_cinfo->nwritten == 0)
540 return 0;
541 return fl_cinfo->ops->scan_commit_lists(cinfo, max);
542}
543
544static inline void
545pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo)
546{
547 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
548
549 if (fl_cinfo && fl_cinfo->nwritten != 0)
550 fl_cinfo->ops->recover_commit_reqs(head, cinfo);
551}
552
553static inline struct nfs_page *
554pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
555 struct page *page)
556{
557 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
558
559 if (!fl_cinfo->ops || !fl_cinfo->ops->search_commit_reqs)
560 return NULL;
561 return fl_cinfo->ops->search_commit_reqs(cinfo, page);
562}
563
564
565static inline bool
566pnfs_ld_layoutret_on_setattr(struct inode *inode)
567{
568 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
569 return false;
570 return NFS_SERVER(inode)->pnfs_curr_ld->flags &
571 PNFS_LAYOUTRET_ON_SETATTR;
572}
573
574static inline bool
575pnfs_ld_read_whole_page(struct inode *inode)
576{
577 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
578 return false;
579 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE;
580}
581
582static inline int
583pnfs_sync_inode(struct inode *inode, bool datasync)
584{
585 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
586 return 0;
587 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync);
588}
589
590static inline bool
591pnfs_layoutcommit_outstanding(struct inode *inode)
592{
593 struct nfs_inode *nfsi = NFS_I(inode);
594
595 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 ||
596 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0;
597}
598
599static inline int pnfs_return_layout(struct inode *ino)
600{
601 struct nfs_inode *nfsi = NFS_I(ino);
602 struct nfs_server *nfss = NFS_SERVER(ino);
603
604 if (pnfs_enabled_sb(nfss) && nfsi->layout) {
605 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags);
606 return _pnfs_return_layout(ino);
607 }
608
609 return 0;
610}
611
612static inline bool
613pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
614 struct nfs_server *nfss)
615{
616 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld &&
617 nfss->pnfs_curr_ld->id == src->l_type);
618}
619
620static inline u64
621pnfs_calc_offset_end(u64 offset, u64 len)
622{
623 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset)
624 return NFS4_MAX_UINT64;
625 return offset + len - 1;
626}
627
628static inline u64
629pnfs_calc_offset_length(u64 offset, u64 end)
630{
631 if (end == NFS4_MAX_UINT64 || end <= offset)
632 return NFS4_MAX_UINT64;
633 return 1 + end - offset;
634}
635
636static inline void
637pnfs_copy_range(struct pnfs_layout_range *dst,
638 const struct pnfs_layout_range *src)
639{
640 memcpy(dst, src, sizeof(*dst));
641}
642
643static inline u64
644pnfs_end_offset(u64 start, u64 len)
645{
646 if (NFS4_MAX_UINT64 - start <= len)
647 return NFS4_MAX_UINT64;
648 return start + len;
649}
650
651
652
653
654
655
656
657
658static inline bool
659pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2)
660{
661 return (end1 == NFS4_MAX_UINT64 || start2 < end1) &&
662 (end2 == NFS4_MAX_UINT64 || start1 < end2);
663}
664
665static inline bool
666pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1,
667 const struct pnfs_layout_range *l2)
668{
669 u64 end1 = pnfs_end_offset(l1->offset, l1->length);
670 u64 end2 = pnfs_end_offset(l2->offset, l2->length);
671
672 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2);
673}
674
675static inline bool
676pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req)
677{
678 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length);
679 u64 req_last = req_offset(req) + req->wb_bytes;
680
681 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last,
682 req_offset(req), req_last);
683}
684
685extern unsigned int layoutstats_timer;
686
687#ifdef NFS_DEBUG
688void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id);
689#else
690static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id)
691{
692}
693
694#endif
695#else
696
697static inline bool nfs_have_layout(struct inode *inode)
698{
699 return false;
700}
701
702static inline void pnfs_destroy_all_layouts(struct nfs_client *clp)
703{
704}
705
706static inline void pnfs_destroy_layout(struct nfs_inode *nfsi)
707{
708}
709
710static inline void pnfs_destroy_layout_final(struct nfs_inode *nfsi)
711{
712}
713
714static inline struct pnfs_layout_segment *
715pnfs_get_lseg(struct pnfs_layout_segment *lseg)
716{
717 return NULL;
718}
719
720static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg)
721{
722}
723
724static inline int pnfs_return_layout(struct inode *ino)
725{
726 return 0;
727}
728
729static inline int pnfs_commit_and_return_layout(struct inode *inode)
730{
731 return 0;
732}
733
734static inline bool
735pnfs_ld_layoutret_on_setattr(struct inode *inode)
736{
737 return false;
738}
739
740static inline bool
741pnfs_ld_read_whole_page(struct inode *inode)
742{
743 return false;
744}
745
746static inline int
747pnfs_sync_inode(struct inode *inode, bool datasync)
748{
749 return 0;
750}
751
752static inline bool
753pnfs_layoutcommit_outstanding(struct inode *inode)
754{
755 return false;
756}
757
758
759static inline bool
760pnfs_roc(struct inode *ino,
761 struct nfs4_layoutreturn_args *args,
762 struct nfs4_layoutreturn_res *res,
763 const struct cred *cred)
764{
765 return false;
766}
767
768static inline int
769pnfs_roc_done(struct rpc_task *task,
770 struct nfs4_layoutreturn_args **argpp,
771 struct nfs4_layoutreturn_res **respp,
772 int *ret)
773{
774 return 0;
775}
776
777static inline void
778pnfs_roc_release(struct nfs4_layoutreturn_args *args,
779 struct nfs4_layoutreturn_res *res,
780 int ret)
781{
782}
783
784static inline bool
785pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task)
786{
787 return false;
788}
789
790static inline void set_pnfs_layoutdriver(struct nfs_server *s,
791 const struct nfs_fh *mntfh,
792 struct nfs_fsinfo *fsinfo)
793{
794}
795
796static inline void unset_pnfs_layoutdriver(struct nfs_server *s)
797{
798}
799
800static inline int
801pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
802 struct nfs_commit_info *cinfo)
803{
804 return PNFS_NOT_ATTEMPTED;
805}
806
807static inline struct pnfs_ds_commit_info *
808pnfs_get_ds_info(struct inode *inode)
809{
810 return NULL;
811}
812
813static inline void
814pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
815{
816}
817
818static inline void
819pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo)
820{
821}
822
823static inline void
824pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
825{
826}
827
828static inline bool
829pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
830 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
831{
832 return false;
833}
834
835static inline bool
836pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
837{
838 return false;
839}
840
841static inline int
842pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
843 int max)
844{
845 return 0;
846}
847
848static inline void
849pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo)
850{
851}
852
853static inline struct nfs_page *
854pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
855 struct page *page)
856{
857 return NULL;
858}
859
860static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync)
861{
862 return 0;
863}
864
865static inline bool
866pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
867 struct nfs_server *nfss)
868{
869 return false;
870}
871
872static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void)
873{
874 return NULL;
875}
876
877static inline void nfs4_pnfs_v3_ds_connect_unload(void)
878{
879}
880
881static inline bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst,
882 struct pnfs_layout_range *dst_range,
883 struct inode *inode)
884{
885 return false;
886}
887
888static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data,
889 struct nfs_open_context *ctx)
890{
891}
892
893static inline void pnfs_parse_lgopen(struct inode *ino,
894 struct nfs4_layoutget *lgp,
895 struct nfs_open_context *ctx)
896{
897}
898
899static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp)
900{
901}
902
903static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo)
904{
905 return false;
906}
907
908#endif
909
910#if IS_ENABLED(CONFIG_NFS_V4_2)
911int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags);
912#else
913static inline int
914pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags)
915{
916 return 0;
917}
918#endif
919
920#endif
921